Tread portion of an automobile tire



FIG. 1 is a front view of a tread portion of an automobile tire;

FIG. 2 is a perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a fragmentary enlarged view showing the details thereof;

FIG. 5 is an end view taken along line A—A in FIG. 4; and,

FIG. 6 is an end view taken along line B—B in FIG. 4.

In the drawings, broken lines are used to show the sidewalls and inner surface of the tire, which form no part of the claimed design. 

The ornamental design for a tread portion of an automobile tire, as shown and described. 